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Confidence Interval fro +/-10

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Asked: Dec 14th, 2014

Question description

Researchers claim that women speak significantly more words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four- day period. From these recordings, the daily word count of the 20 men in the study was determined. Here are their daily word counts:

28406

10084

15935

21695

37781

10579

12876

11064

17789

13185

8923

6486

8157

7022

4436

10054

3998

12642

10964

5255

A 90% confidence interval (10) for the mean number of words per day of men at this university is from ___ to ___ words.